4g and picture mail

[mlopez1003]

I was wondering if anyone else is having the same problem i am. I found that when i receive a picture mail from either another sprint phone or other while running 3g i get the pictures without problem. where i have the problem is when i am on 4g and someone sends me a picture i get a message to download but it does not come thru. The minute i disable 4g and click to download i get the pic. Sprint doesn't know what is going on and tell me to take it to a sprint store for exchange. Is this possible a phone issue or 4g issue ?